Ivko scraper

ABSTRACT

A scraper including an elongated handle having a shank member projecting forwardly from one end thereof with a guide head formed integrally with the forward end of the shank member, the guide member of flat stock material defining flat transversely spaced front and back surfaces with curved top and bottom edges, the forwardly projecting end portion of the guide head having a tapered forwardly extending pointed member formed integrally therewith, an opening disposed centrally of the guide head and extending transversely therethrough, a pair of diametrically spaced apart pin stop members each spaced on an opposite side of the guide head opening and projecting outwardly from the front surface of the guide head, a scraping blade member adapted for detachable mounting to the guide head by use of the opening and adapted for rotation about its axis within the limits prescribed by the stop members, and a bolt adapted for securing the blade member pivotally to the guide head to permit pivotal movement of the blade thereabout when operating the scraper in a back and forth manner to clean the edges of concrete forms.

United States Patent 1 lvko [ Sept. 17, 1974 IVKO SCRAPER [76] Inventor:Joseph J. lvko, 1644 Magellan Dr.,

Sarasota, Fla. 33580 22 Filed: Nov. 8, 1973 21 Appl. No.; 413,872

[52] US. Cl...i 30/169, 56/105, 7/l4.1 A [51] Int. Cl. B26b 11/00, A47113/08 [58] Field of Search 30/169, 171, 172, 136, 30/359; 15/105, 236 R;7/14.1 A

[56] References Cited UNITED STATES PATENTS 62,064 2/1867 Peters 30/169503,098 8/1893 Newton 30/169 713,979 ll/l902 Galipeau 30/171 717,49812/1902 Dean 30/171 722,250 3/1903 Powell .t 30/171 Primary ExaminerAlLawrence Smith Assistant ExaminerJ. C. Peters [57] ABSTRACT A scraperincluding an elongated handle having a shank member projecting forwardlyfrom one end thereof with a guide head formed integrally with theforward end of the shank member, the guide member of flat stock materialdefining flat transversely spaced front and back surfaces with curvedtop and bottom edges, the forwardly projecting end portion of the guidehead having a tapered forwardly extending pointed member formedintegrally therewith, an opening disposed centrally of the guide headand extending transversely therethrough, a pair of diametrically spacedapart pin stop members each spaced on an opposite side of the guide headopening and projecting outwardly from the front surface of the guidehead, a scraping blade member adapted for detachable mounting to theguide head by use of the opening and adapted for rotation about its axiswithin the limits prescribed by the stop members, and a bolt adapted forsecuring the blade member pivotally to the guide head to permit pivotalmovement of the blade thereabout when operating the scraper in a backand forth manner to clean the edges of concrete forms.

6 Claims, 5 Drawing Figures IVKO SCRAPER BACKGROUND OF THE INVENTION 1.Field of the Invention This invention relates generally to scrapers andmore particularly to a novel and improved scraper specifically designedfor use in the scraping and cleaning of concrete forms and the like usedin the construction industry.

2. Description of the Prior Art There have long been known in the priorart scraper devices of various types and configurations for scrapingpaint finishes, decorated surfaces, and the like to provide the samewith a smooth finish. Such scrapers further normally provide that thescraping blade is of a double edged type so that upon dulling of thefirst edge,

the blade may be removed from the scraper and rotated in a manner toexpose the second edge for utilization before having to discard orsharpen the blade.

However, all such prior art devices are adapted more-or-less for use asfinishing tools, and are not designed or adapted for the rough usage andtreatment required of the construction industry for the scraping andcleaning of concrete remains from the edges of concrete forms prior tofurther usage of the same.

Thus, the construction industry utilizes conventional type scrapers atthe present time for scraping the forms and form edges used inconstruction for the cleaning of the concrete which may be stickingthereto from the prior use of the forms, this being required prior tofresh utilization of the concrete forms if the forms are to be properlyfitted together in adjacent relationship with tight edges to preventconcrete from leaking therethrough.

Such conventional type scrapers, however, require a great amount of timeand effort on the part of the worker to properly scrape the forms, withsuch scrapers normally resulting in a slight damage to the edges of theform during each scraping so that eventually, after a great number ofscrapings, the form edges are marred to a degree requiring replacementif the form is to remain serviceable, as otherwise the damage thereto isof a nature requiring the discarding of the concrete form.

It would thus be desirable to provide a scraper specifically designedfor use by the construction industry in the scraping of the edges ofconcrete forms and the like in a manner to not damage the forms whileproviding ease of use and efficiency of the time of the worker.

SUMMARY OF THE INVENTION The presentinvention remedies and overcomes allof the foregoing deficiencies and disadvantages of presently usedconventional scrapers in the concrete construction industry by providinga novel scraper having a special guide head providing a perfect guidefor the scraper along the edge of a concrete form and incorporatingtherein a double edged replaceable blade, the blade being supplied indifferent sizes such that the scraper may be used to scrape the edges ofconcrete forms of different sizes and configurations.

It is a feature of the invention to provide a scraping device which isstrong and relatively simple in construction, which is provided withmeans for quickly re.- moving the blade for replacement and changingpurposes while still pivotally securing the blade to the scraping devicein a manner to permit the rotation thereof about its axis to expose adifferent scraping edge of the blade for different movements of thescraper relative to the edge of the concrete form.

A further feature of the invention provides a scraper designedspecifically for the concrete construction industry wherein both edgesof the scraper are used to clean the concrete form.

Still a further feature of the present invention provides a scraperhaving a guide head used to align the scraping blade along an edge ofthe concrete form to prevent any slipping thereof thus avoiding damageto the edges of the form, this resulting in a saving of time and aspeeding up of production as well as saving the cost of replacement offorms to the contractor.

Still a further feature of the present invention provides a scraperpermitting a worker to stand along one side of a concrete form in amanner facing the edge thereof and to be able to, in one easy motion,clean the edge of the form by first placing the guide head against theedge of the form and then moving the scraper back and forth therealong,such as in an upward and downward motion, to thus clean the edge of theform without taking the scraper off of the form edge.

Still a further feature of the present invention provides a guide headhaving a blunt pointed edge projecting forwardly thereof and intendedfor use in cleaning areas of concrete forms where the concrete hasimbedded itself, such as in the dogs of the clamps that hold the formssecurely together along their edges, this thus enabling a worker toclean the concrete from-the fastening hardware as used on concreteforms.

The provision of a scraping device for use in scraping and cleaning theedges of concrete forms as used in the construction industry, such asbriefly outlined above, and possessing the stated advantages,constitutes the principal features and advantages of the presentinvention. The provision of a scraper which is simple in itsconstruction and which is formed of a plurality of components each beingreadily manufactured at a relatively low cost and by simplemanufacturing methods due to their respective simplicity ofconstruction; one which is rugged and durable and which therefore may beguaranteed by the manufacturer to withstand the rough usage normallyassociated with the construction industry; one permitting ease ofchangement of blades to encourage the worker to always utilize anappropriate sharpened blade rather than a blade having dulled scrapingedges; one which is provided with a guide head providing the perfectguide for the scraping and cleaning of the edges of the concrete forms;and one which, otherwise, is well adapted to perform the servicesrequired of it, are further desirable features which have been borne inmind in the production and development of the present invention.

Other features and advantages of this invention will be apparent duringthe course of the following description.

BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings forming apart of this specification, and in which like reference characters areemployed to designate like parts throughout the same:

FIG. 1 is a front perspective view of the scraper of the presentinvention having a typical blade attached thereto;

FIG. 2 is a front exploded perspective view of the scraper;

FIG. 3 is an enlarged fragmentary cross-sectional view taken along Line3-3 of FIG. 1 when the tool is in the inverted position;

FIG. 4 is an enlarged fragmentary cross-sectional view similar to FIG. 3but with the blade engaging the opposite stop member; and

FIG. 5 is an enlarged fragmentary cross-sectional view taken along Line5-5 of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings inwhich like reference characters indicate like elements throughout thesame, there is illustrated a scraper constructed in accordance with theprinciples of the present invention and designated generally in itsentirety by the reference numeral and which has a scraping bladedetachably mounted thereto in a pivotal manner.

The scraper 10 includes an elongated handle 11 having a forward end 12,the handle preferably being of a generally cylindrical configurationtapered toward the forward end and adapted for firm gripping in the handof an individual worker. If desired, the handle 11 may be of asufficient length to permit the scraper to be gripped in both hands of aworker should such be desirable for more efficient operation in thecleaning of the edges of a concrete form. The handle 1 1 may bemanufactured out of metal, wood, plastic, or any other suitablesatisfactory material.

Projecting longitudinally forward of the handle 11 is a shank 21 made offlat stock material, one end of the shank being permanently attached tothe handle 11 in any known manner with the shank projecting outwardlyfrom the end 12 of the handle. A guide head 25 is formed integrally onthe forward end portion of the shank 21, the guide head being of a flatgenerally elliptical configuration having flat transversely spacedparallelly extending from and back surfaces 26 and 27 respectively, andarcuate opposed concave top and bottom edge surfaces 28 and 29respectively. The guide head 25 is formed co-planar with the plane ofthe shank 21 in the preferred embodiment, with it being understood thatshank 21 may be of other suitable configurations if so desired.Projecting forwardly of guide head 25 and formed integrally therewith isa tapered triangularly shaped member 31 formed co-planar with the guidehead and having a blunt pointed front end portion 32 formed thereon in aconical shape. Further, extending transversely through guide head 25approximately centrally thereof is an opening 33. Spaced radially fromthe axis of opening 33 there is provided a pair of stop members in theform of elongated cylindrical pins 34 and 35 each having one end mountedto the front surface 26 of the guide head 25 and projecting axiallyoutwardly therefrom normal to the plane of the guide head, the pins 34and 35 being preferably spaced in diametric alignment with each other astaken through the axis of the opening 33.

A scraping blade is provided consisting of a cylindrically shaped bodyportion 51 having an aperture 52 extending completely through the widthof the body portion, a rectangularly shaped blade portion 53 formedintegrally with the body portion with a thickness less than the diameterof the body portion and projecting radially outwardly from the axisthereof, and a double edged scraping edge portion 54 provided on theoutermost projecting end of the blade portion 53 and extending along thecomplete width thereof. The cylindrically shaped body portion 51 isprovided with an inner end 48 and an outer end 49. The end of opening 52disposed in outer end 49 of body portion 51 is provided with an enlargeddiameter designated generally by reference numeral 55 extendingpartially inwardly of the body portion coaxial with opening 52 andadapted to receive therein a head 61 of an elongated threaded boltmember 62 when the same is axially inserted into opening 52, the head 61being received on a shoulder 56 defined between adjacent openings 52 and55.

A nut 65 having a threaded opening 66 extending therethrough is adaptedto threadedly engage the end of bolt 62. An internal opening 67 isprovided in an edge of the nut 65 and extends radially therethrough toreceive therein a set screw 68, the. use of the same which will bedescribed in later paragraphs.

Adapted to be disposed intermediate nut 65 and back surface 27 of gudehead 25 is a ring shaped thrust bearing 70 having an opening 71extending therethrough centrally thereof with the diameter of theopening being slightly larger than the diameter of opening 66 in nut 65to permit the bolt 62 to pass freely therethrough.

Adapted to be disposed intermediate inner end 48 of cylindrical bodyportion 51 of blade member 50 and front surface 26 of guide head 25 is-adisc shaped washer 72 having an opening 73 disposed centrally thereofand extending axially therethrough, the opening 73 having a diametergreater than the diameter of bolt 62 in order to permit the free passageof the bolt therethrough.

It is to be understood that blade member 50 may be provided in differentsizes such that the length of bolt 62 may vary to accomodate blademembers of different widths without having the access length of the boltmember projecting outwardly of the nut 65 when the scraper 10 is in theassembled condition.

In operation, the bolt member 62 is axially inserted into opening 52 inthe blade member to project out of the inner end 48 thereof, after whichthe bolt passes through opening 73 and washer 72, after which the boltpasses through opening 33 of guide head 25 in a manner to place thewasher 72 into juxtaposition with the front surface 26 of the guidehead, after which the bolt passes through opening 71 of thrust bearing70, after which nut 65 is threadedly engaged by opening 66 on the boltwith the nut bearing against thrust bearing 70 until the desiredtightening of the bolt to the guide head is achieved, this beingdetermined when the blade is snugly mounted and yet capable of pivotalmovement about the axis of opening 52 relative to the guide head, afterwhich set screw 68 is operated in a manner to engage the portion of bolt62 passing through nut opening 66 so as to positively retain the tool inthe assembled position and prevent any loosening tendencies of the nutduring the usage of the scraping device 10, such as due to vibrations,accidental dropping, and the like. The blade is now mounted for pivotalmovement about the axis of opening 52 with the limits of such movementbeing determined by pins 34 and 35 defining stop members for the blade.

In use, a worker positions himself along a side of a concrete form in amanner facing the edge of the form and, in one easy motion, cleans theedge of the concrete form by first placing the guide against the edge ofthe form and then in a back and forth movement of the scraping device10, such as in an upward and downward movement along the edge of theconcrete form, the blade edge 54 effectively scrapes the form edge toclean any concrete remains therefrom prior to further usage of theconcrete form, this scraping being in a manner not causing damage to theedges of the concrete forms. When scraping in one direction the blade 53rotates about bolt 62 until engaging stop 35 such that one edge of theblade edge 54 engages and scrapes the edge of the concrete form, withmovement of the scraping device in the opposite direction effecting thepivotal movement of the blade 53 about bolt 62 until it engages theopposite stop member 34 such that the opposite edge of scraping edge 54engages the edge of the concrete form to effect the scraping thereof.Thus, both edges of the scraping edge 54 of the blade 53 are used duringthe scraping of the edge of a concrete form.

As to the blunt point 32, this is used to effect the cleaning of areasof a concrete form where concrete has imbedded itself, this especiallybeing important in the cleaning of the fastening hardware found on concrete forms, such as in the dogs and clamps used to secure concreteforms securely together in edge-to-edge relationship.

There is thus provided a novel scraper specifically intended for thescraping of concrete from the edge of concrete forms while alsoproviding a tool to effect the cleaning of fastening hardware ofconcrete forms such that the forms may be used numerous times in aneffective manner with such scraping and cleaning being performed in away not damaging or marring the forms in any way.

It is to be understood that the form of this invention herewith shownand described is to be taken as a preferred example of the same, andthat this invention is not to be limited to the exact arrangement ofparts shown in the accompanying drawings or described in thisspecification as various changes in the details of construction as toshape, size, and arrangement of parts may be resorted to withoutdeparting from the spirit of the invention, the scope of the novelconcepts thereof, or the scope of the sub-joined claims.

Having thus described the invention, what is claimed 1. A scraperintended for the use in the cleaning and scraping of the edges ofconcrete forms along with the cleaning of concrete which may be imbeddedin the hardware of such forms, comprising:

an elongated handle adapted for gripping in at least one hand by anindividual using the scraper;

a longitudinally extending shank having one end connected to the handlewith the opposite end projecting longitudinally forwardly of the handle;

a guide head member formed integrally with the opposite end of theshank, the guide head member of flat stock material having flattransversely spaced front and back surfaces with concavely curved topand bottom edges defining a generally elliptical configuration havingthe major axis thereof extending substantially coaxially with thelongitudinally extending axis of the shaft;

an opening disposed centrally of the guide head member and extendingtransversely therethrough between the front and back surfaces thereof;

a pair of spaced apart stop members each defined by a pin projectingoutwardly from the front surface of the guide head member, the stopmembers being spaced apart at opposite sides of the opening in the guidehead member;

a tapered forwardly extending pointed member having a blunt forward edgeand being formed integrally with the guide head member and projectingforwardly thereof;

a scraping blade member having a body portion, a blade portion, and adouble edged scraping edge portion, the scraping blade adapted to bemounted to the guide head member in a manner extending normal to theplane of the guide head member and adapted to be removably attached tothe front surface of the guide head member in a position projectingtransversely outwardly therefrom, the blade portion adapted to extendradially outwardly from the guide head member, and the scraping edgeextending completely across the width of the blade transversely to theguide head member; and

means detachably securing the scraping blade member to the guide headmember in a positive manner to permit rotative movement of the scrapingblade member relative to the guide head member between said pair of stopmembers.

2. A scraper as set forth in claim 1 wherein the scraping blade membercomprises a body portion cylindrical in configuration and extendingacross the complete width thereof and having an aperture extendingcompletely therethrough, said blade portion being rectangular inconfiguration and extending along the length of said body portion andprojecting radially outwardly therefrom, said blade portion being formedintegrally with said body portion, and said scraping edge being definedat the outermost free end of said blade portion and having a pair ofopposed scraping edges formed thereon, each scraping edge adapted forengaging the edge of a concrete form to effect the scraping and cleaningthereof upon movement of the scraper in a back and forth motion alongthe edge of the concrete form.

3. A scraper as set forth in claim 2 wherein the means detachablysecuring the scraping blade member to the guide head comprises anelongated threaded bolt member having an enlarged head portion and athreaded shank extending axially outwardly therefrom, said cylindricalbody portion of said blade member having an inner end and an outer end,a cylindrical recessed opening formed in said outer end concentric withsaid body portion aperture and having a diameter greater than saidaperture, said cylindrical recess adapted tov receive therein said headportion of said bolt member, said aperture in said body portion beingaxially aligned with the opening in said guide head member andpositioned adjacent the front surface thereof with said bolt memberpassing axially through said aligned aperture and opening to passoutwardly of the back surface of said guide head member, a nut having athreaded opening extending therethrough and adapted to threadedly engagethe projecting end of said bolt member to secure the bolt and attachedblade member to said guide head in a'manner permitting pivotal movementof the blade member about the axis of said bolt, and means forselectively locking said nut at selected positions along the length ofsaid bolt for positively securing said nut to said bolt.

4. The scraper as set forth in claim 3 wherein said means for lockingsaid nut to said bolt comprises a threaded opening extending radiallythrough said nut intermediate the exterior surface thereof and saidthreaded opening therein, and a threaded set screw adapted to threadedlyengage said radial opening in a manner having the innermost end thereofengage a portion of said shank of said bolt extending through saidthreaded opening to secure the nut onto said bolt and prevent rotationof said nut relative to said bolt when said set screw is firmlytightened in said radial opening.

5. The scraper as set forth in claim 4 further comprising asubstantially flat disc shaped washer having an opening extendingtherethrough centrally thereof, the

guide head member.

1. A scraper intended for the use in the cleaning and scraping of theedges of concrete forms along with the cleaning of concrete which may beimbedded in the hardware of such forms, comprising: an elongated handleadapted for gripping in at least one hand by an individual using thescraper; a longitudinally extending shank having one end connected tothe handle with the opposite end projecting longitudinally forwardly ofthe handle; a guide head member formed integrally with the opposite endof the shank, the guide head member of flat stock material having flattransversely spaced front and back surfaces with concavely curved topand bottom edges defining a generally elliptical configuration havingthe major axis thereof extending substantially coaxially with thelongitudinally extending axis of the shaft; an opening disposedcentrally of the guide head member and extending transverselytherethrough between the front and back surfaces thereof; a pair ofspaced apart stop members each defined by a pin projecting outwardlyfrom the front surface of the guide head member, the stop members beingspaced apart at opposite sides of the opening in the guide head member;a tapered forwardly extending pointed member having a blunt forward edgeand being formed integrally with the guide head member and projectingforwardly thereof; a scraping blade member having a body portion, ablade portion, and a double edged scraping edge portion, the scrapingblade adapted to be mounted to the guide head member in a mannerextending normal to the plane of the guide head member and adapted to beremovably attached to the front surface of the guide head member in aposition projecting transversely outwardly therefrom, the blade portionadapted to extend radially outwardly from the guide head member, and thescraping edge extending completely across the width of the bladetransversely to the guide head member; and means detachably securing thescraping blade member to the guide head member in a positive manner topermit rotative movement of the scraping blade member relative to theguide head member between said pair of stop members.
 2. A scraper as setforth in claim 1 wherein the scraping blade member comprises a bodyportion cylindrical in configuration and extending across the completewidth thereof and having an aperture extending completely therethrough,said blade portion being rectangular in configuration and extendingalong the length of said body portion and projecting radially outwardlytherefrom, said blade portion being formed integrally with said bodyportion, and said scraping edge being defined at the outermost free endof said blade portion and having a pair of opposed scraping edges formedthereon, each scraping edge adapted for engaging the edge of a concreteform to effect the scrapinG and cleaning thereof upon movement of thescraper in a back and forth motion along the edge of the concrete form.3. A scraper as set forth in claim 2 wherein the means detachablysecuring the scraping blade member to the guide head comprises anelongated threaded bolt member having an enlarged head portion and athreaded shank extending axially outwardly therefrom, said cylindricalbody portion of said blade member having an inner end and an outer end,a cylindrical recessed opening formed in said outer end concentric withsaid body portion aperture and having a diameter greater than saidaperture, said cylindrical recess adapted to receive therein said headportion of said bolt member, said aperture in said body portion beingaxially aligned with the opening in said guide head member andpositioned adjacent the front surface thereof with said bolt memberpassing axially through said aligned aperture and opening to passoutwardly of the back surface of said guide head member, a nut having athreaded opening extending therethrough and adapted to threadedly engagethe projecting end of said bolt member to secure the bolt and attachedblade member to said guide head in a manner permitting pivotal movementof the blade member about the axis of said bolt, and means forselectively locking said nut at selected positions along the length ofsaid bolt for positively securing said nut to said bolt.
 4. The scraperas set forth in claim 3 wherein said means for locking said nut to saidbolt comprises a threaded opening extending radially through said nutintermediate the exterior surface thereof and said threaded openingtherein, and a threaded set screw adapted to threadedly engage saidradial opening in a manner having the innermost end thereof engage aportion of said shank of said bolt extending through said threadedopening to secure the nut onto said bolt and prevent rotation of saidnut relative to said bolt when said set screw is firmly tightened insaid radial opening.
 5. The scraper as set forth in claim 4 furthercomprising a substantially flat disc shaped washer having an openingextending therethrough centrally thereof, the washer being interposedbetween said inner end of said cylindrical body portion of said blademember and said front surface of said guide head member.
 6. The scraperas set forth in claim 5 further comprising a thrust bearing having anopening disposed centrally thereof and extending therethrough andadapted to permit free passage of said shank portion of said bolt membertherethrough, said thrust bearing being interposed between said nut andsaid back surface of said guide head member.